Magnetic adsorption positioning and rotation mechanism and its use method

Abstract

The present invention discloses a magnetic adsorption type positioning and rotation mechanism and its use method, comprising a positioning mechanism and a rotation mechanism that are fixedly connected and form a synchronous rotating whole. The present invention can realize the rapid clamping and positioning of an annular thin disk with a tapered surface. The axial positioning adopts the method of magnetic adsorption. The adsorption force is adjusted by changing the axial position of the strong magnetic column in the guide hole, avoiding secondary deformation during the detection and positioning process, and ensuring the accurate detection of form and position tolerance parameters. The rotation accuracy of the rotation mechanism reaches 0.003mm. At different speeds, the accuracy error is within ±0.001mm, which minimizes the system error of the transmission system. The integrated design of the rotary shaft system and the workpiece positioning platform is realized, avoiding the occurrence of matching errors between the transmission mechanism and the positioning mechanism. The present invention also has significant advantages such as low friction torque, large load, and high reliability. It can effectively avoid the system error caused by the low rotation accuracy of the rotary shaft system and meet the sampling needs of rapid detection of annular thin disks with tapered surfaces.

Description

Technical Field

[0001] The present invention relates to the technical field of precision detection of mechanical products, and in particular to a magnetic adsorption type positioning and rotating mechanism and a method of using the same. Background Art

[0002] A tapered annular disk is a thin-walled metal component that requires numerous axial and radial inspections, including critical geometric dimensions and form and position tolerances such as thickness, wall thickness uniformity, and coaxiality. While typically performed using a three-dimensional coordinate measuring machine (CMM), a typical precision testing method, achieves high measurement accuracy but suffers from low efficiency and requires high technical expertise, making it unsuitable for batch testing. Therefore, it is imperative to develop an online inspection method suitable for batch manufacturing, requiring specialized testing equipment capable of rapid and precise measurement. This equipment should be able to simultaneously inspect numerous parameters of the tapered annular disk, thereby improving inspection efficiency. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a magnetic adsorption positioning and rotation mechanism for detecting important geometric dimensions and form and position tolerances of annular thin disks with tapered surfaces. The mechanism can not only realize the precise measurement and positioning of annular thin disks with tapered surfaces, but also drive their precise rotation, thereby completing accurate measurement points, and further realizing rapid and accurate measurement of annular thin disks with tapered surfaces, thereby improving detection efficiency and adapting to the requirements of batch detection.

[0004] Another object of the present invention is to provide a method for using a magnetic adsorption type positioning and rotating mechanism for detecting important geometric dimensions and form and position tolerances of an annular thin disk with a tapered surface.

[0005] Another object of the present invention is to provide a detection device with a magnetic adsorption positioning and rotation mechanism

[0006] The present invention is achieved through the following technical solutions:

[0007] A magnetic adsorption type positioning and rotating mechanism, comprising a positioning mechanism and a rotating mechanism which are fixedly connected and form a synchronous rotating whole;

[0008] The positioning mechanism includes a positioning platform, and a strong magnetic column for adsorbing the annular thin disk with a conical surface is provided on the top of the positioning platform;

[0009] The rotary mechanism includes a main shaft fixedly connected to the bottom end of the positioning platform and capable of rotating along the axial direction, and a shaft sleeve sleeved outside the main shaft. The shaft sleeve is coaxially arranged with the main shaft and forms relative rotation with the main shaft.

[0010] In the above technical solution, the rotary mechanism includes an upper thrust cover, a lower thrust cover and a nut. The upper thrust cover is fixedly connected to the top end of the main shaft, and the bottom surface of the upper thrust cover and the top surface of the shaft sleeve can rotate relative to each other. The lower thrust cover is sleeved outside the main shaft and the top surface of the lower thrust cover and the bottom surface of the shaft sleeve can rotate relative to each other. The nut is connected to the bottom end of the main shaft by a threaded connection.

[0011] In the above technical solution, the upper thrust cover and the positioning platform are made in one piece or fixedly connected by screws.

[0012] In the above technical solution, both ends of the sleeve are provided with the same annular ridges, and a ball rack is provided between the main shaft and the sleeve. The ball rack has the same shape as the sleeve, and balls that can roll freely in the ball rack are embedded in the ball rack. The balls are evenly distributed between the upper thrust cover and the sleeve, between the sleeve and the lower thrust cover, and between the sleeve and the main shaft to realize the shaft system rotation of the main shaft.

[0013] In the above technical solution, the balls located between the bushing and the main shaft are arranged in a spiral shape.

[0014] In the above technical solution, the positioning platform is vertically arranged and is a stepped shaft structure, which includes the first shaft segment, the second shaft segment, the third shaft segment and the fourth shaft segment from top to bottom. The shaft diameter of the first shaft segment is matched according to the center hole of the annular thin disk with a tapered surface and the two are clearance-matched; the shaft diameter of the second shaft segment is larger than the shaft diameter of the first shaft segment, and its end face close to the first shaft segment is a concave surface with a cone angle of 0°-180°. The concave surface is provided with 3-6 strong magnetic column guide holes that vertically penetrate the second shaft segment and are evenly distributed in a circular array near the outer edge. The strong magnetic column is arranged in the strong magnetic column guide hole and its end face is lower than the top of the strong magnetic column guide hole; the shaft diameter of the third shaft segment is smaller than the shaft diameter of the second shaft segment; the fourth shaft segment is provided with 3-6 axial through holes that are evenly distributed in a circular array near the outer edge.

[0015] In the above technical solution, the axial height of the first shaft segment is 0.3mm-1mm.

[0016] In the above technical solution, the strong magnetic column and the strong magnetic column guide column are interference fit.

[0017] In the above technical solution, the top end surface of the main shaft is provided with axial threaded holes arranged in a circumferential array for screwing in screws to achieve connection with the upper thrust cover.

[0018] In the above technical solution, the upper thrust cover is provided with axial through holes arranged in a circumferential array near the center for connecting with the main shaft, and the upper thrust cover is provided with axial threaded through holes arranged in a circumferential array near the edge for connecting with the positioning platform.

[0019] In the above technical solution, a disc spring is sleeved on the bottom of the main shaft close to the bottom surface of the lower thrust cover, and a recess matching the disc spring is formed upward on the bottom surface of the lower thrust cover.

[0020] In the above technical solution, a washer is sleeved on the portion of the main shaft located between the nut and the disc spring.

[0021] A magnetic adsorption positioning and rotation mechanism of the present invention is the main structure of a fast special detection device for an annular thin disk with a conical surface. The mechanism is connected to the frame of the device through the shaft sleeve, and the main shaft is connected to the drive motor through a pulley to realize the rotation of the mechanism; the specific method of use is: the annular thin disk with the conical surface is installed on the positioning platform with a center hole as a reference through a clearance fit, and the magnetic force of the strong magnetic column makes the convex conical surface of the annular thin disk with the conical surface fit with the conical surface of the positioning platform to achieve line contact, thereby completing the positioning of the annular thin disk with the conical surface; starting the motor, driving the main shaft to rotate, driving the annular thin disk with the conical surface to rotate synchronously, sampling points through the sensor, and completing the measurement after the annular thin disk with the conical surface rotates one circle.

[0022] A detection device with a magnetic adsorption positioning and rotation mechanism, characterized in that it includes a frame, a drive mechanism, a measuring mechanism, the magnetic adsorption positioning and rotation mechanism, a control system and a measurement and analysis system. The magnetic adsorption positioning and rotation mechanism is fixed on the frame, the drive mechanism drives the magnetic adsorption positioning and rotation mechanism to rotate, the measuring mechanism is used to collect coordinate signals at different positions on a ring-shaped thin disk with a conical surface, and the measurement and analysis system calculates and displays measurement results and performs data statistical analysis based on the signals collected by the measuring mechanism.

[0023] The advantages and beneficial effects of the present invention are:

[0024] (1) The magnetic adsorption positioning and rotation mechanism of the present invention can realize the rapid clamping and positioning of the annular thin disk with a conical surface. The axial positioning adopts the magnetic adsorption method, and its adsorption force can be adjusted by changing the axial position of the strong magnetic column in the strong magnetic column guide hole. It can avoid the secondary deformation of the annular thin disk with a conical surface during the detection and positioning process, and at the same time ensure the accurate detection of the shape and position tolerance parameters of the annular thin disk with a conical surface.

[0025] (2) The rotation accuracy of the rotary mechanism of the present invention reaches 0.003 mm. At different rotation speeds, the accuracy error is within ±0.001 mm, which minimizes the system error of the transmission system.

[0026] (3) The screw-type positioning and rotating mechanism of the present invention realizes the integrated design of the rotating shaft system and the workpiece positioning platform, avoiding the occurrence of matching errors between the transmission mechanism and the positioning mechanism.

[0027] (4) The magnetic adsorption positioning and rotation mechanism of the present invention also has significant advantages such as small friction torque, large load, and high reliability. It can effectively avoid the system error caused by the low rotation accuracy of the rotating shaft system and meet the sampling needs of rapid detection of annular thin disks with conical surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a partial cross-sectional view of a magnetic adsorption type positioning and rotating mechanism of the present invention.

[0029] Figure 2 yes Figure 1 An enlarged view of the top of the positioning stage 10.

[0030] in:

[0031] 1: Upper thrust cover, 2: Ball carrier, 3: Lower thrust cover, 4: Washer, 5: Nut, 6: Disc spring, 7: Spindle, 8: Ball, 9: Bushing, 10: Positioning table, 10-1: First shaft section, 10-2: Second shaft section, 10-3: Third shaft section, 10-4: Fourth shaft section, 11: Strong magnetic column, 12: Strong magnetic column guide hole.

[0032] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the following embodiments are illustrative rather than restrictive, and the scope of protection of the present invention cannot be limited by the following embodiments.

[0034] Example 1

[0035] A magnetic adsorption type positioning and rotating mechanism comprises a positioning mechanism and a rotating mechanism. The positioning mechanism and the rotating mechanism form a whole that can rotate synchronously. The mechanism rotates under the drive of a driving motor, thereby realizing the rotation detection of an annular thin disk with a conical surface.

[0036] The positioning mechanism includes a positioning platform 10, and a strong magnetic column 11 is provided on the top of the positioning platform 10 for adsorbing the annular thin disk with a conical surface;

[0037] The rotary mechanism is a precision rotary shaft system with a rotation accuracy of up to 0.001mm, including an upper thrust cover 1, a main shaft 7, a sleeve 9, a lower thrust cover 3 and a nut 5; the upper thrust cover 1 is a rotating part that can realize the axial positioning of the entire shaft system and serves as a connecting part connecting the positioning mechanism and the rotary mechanism; the main shaft 7 is the main rotating part and serves as a transmission part. The bottom end is processed with an external thread for screwing the nut 5 to realize the overall assembly of the rotary mechanism. When in use, the main shaft 7 is connected to the drive motor through a pulley to realize the rotation of the mechanism; the positioning platform 10, the upper thrust cover 1 and the main shaft 7 are made as one piece, and the sleeve 9 It is a stationary part, which is sleeved outside the main shaft 7 and coaxially arranged with the main shaft 7. When in use, it is connected to the frame of the detection equipment to fix the entire mechanism; the lower thrust cover 3 is sleeved outside the main shaft 7 and forms an interference fit between the main shaft 7, which is used to support the entire rotary mechanism. The bottom surface of the upper thrust cover 1 and the top surface of the shaft sleeve 9, and the top surface of the lower thrust cover 3 and the bottom surface of the shaft sleeve 9 can rotate relative to each other; the nut 5 is connected to the bottom end of the main shaft 7, and is used to apply a preload to the upper thrust cover 1, the lower thrust cover 3 and the shaft sleeve 9 in the axial direction, so that the rotating part of the rotary mechanism fits tightly, thereby ensuring the rotation accuracy.

[0038] When in use, the present invention is connected to the frame of the detection equipment through the shaft sleeve 9, and the main shaft 7 is connected to the drive motor through the pulley. The annular thin disk with a conical surface is fixed on the positioning platform 10 with the center hole as the reference through a clearance fit. The magnetic force of the strong magnetic column 11 is used to make the convex conical surface of the annular thin disk with a conical surface fit with the conical surface of the positioning platform 10 to complete the positioning of the annular thin disk with a conical surface; the motor is started to drive the main shaft 7 to rotate, driving the annular thin disk with a conical surface to rotate synchronously, and the sensor starts to collect points, and the measurement is completed after one rotation.

[0039] Example 2

[0040] A magnetic adsorption type positioning and rotating mechanism includes a positioning mechanism and a rotating mechanism. The positioning mechanism and the rotating mechanism are fixedly connected to form a whole that can rotate synchronously. The positioning mechanism rotates under the drive of a driving motor, thereby realizing the rotation detection of an annular thin disk with a tapered surface.

[0041] The positioning mechanism includes a positioning platform 10, which is vertically arranged and has a stepped shaft structure. From top to bottom, there are the first shaft segment 10-1, the second shaft segment 10-2, the third shaft segment 10-3 and the fourth shaft segment 10-4. The axial height of the first shaft segment 10-1 is 5 mm, and the shaft diameter is made according to the center hole of the annular thin disk with a tapered surface and the clearance between the two is matched, and the clearance is 0.01 mm; the shaft diameter of the second shaft segment 10-2 is larger than the shaft diameter of the first shaft segment 10-1, and its end face close to the first shaft segment 10-1 is a concave surface with a cone angle of 170°. The concave surface is provided with 4 holes near the outer edge that vertically penetrate the second shaft segment 10-2 and are evenly distributed in a circular array. A strong magnetic column guide hole 12 with a hole diameter of 6mm, a strong magnetic column 11 with a height of 5mm is arranged in the strong magnetic column guide hole 12, the strong magnetic column 11 and the strong magnetic column guide hole 12 have an interference fit, and the end face of the top is 1mm lower than the top of the strong magnetic column guide hole 12, which is used to adsorb the annular thin disk with a conical surface to achieve axial positioning, and the adsorption force of the strong magnetic column 11 on the annular thin disk with a conical surface is adjusted by changing the axial position of the strong magnetic column 11 in the strong magnetic column guide hole 12; the axial diameter of the third shaft segment 10-3 is smaller than the axial diameter of the second shaft segment 10-2 (based on not blocking the strong magnetic column guide hole 12); the fourth shaft segment 10-4 is provided with 4 axial through holes evenly distributed in a circular array near the outer edge for passing screws.

[0042] The rotary mechanism is a precision rotary shaft system with a rotation accuracy of up to 0.001mm, including an upper thrust cover 1, a main shaft 7, a sleeve 9, a lower thrust cover 3 and a nut 5; the upper thrust cover 1 is a rotating part that can realize the axial positioning of the entire shaft system. The upper thrust cover 1 is provided with axial through holes arranged in a circumferential array near the center for connecting with the main shaft 7. Near the edge, there are axial threaded through holes arranged in a circumferential array for connecting to the positioning platform 10, the top end of which is connected to the positioning platform 10 of the positioning mechanism, and the bottom end is connected to the top end of the main shaft 7, serving as a connecting piece connecting the positioning mechanism and the rotary mechanism; the main shaft 7 is the main rotating member, and as a transmission member, the top end of which is provided with axial threaded holes arranged in a circumferential array for screwing in screws to achieve connection with the upper thrust cover 1, and the bottom end is processed with external threads for screwing in the nut 5 to achieve the overall assembly of the rotary mechanism. When in use, the main shaft 7 is connected to the drive motor through a pulley to achieve the rotation of the mechanism; the shaft The sleeve 9 is a stationary part, which is sleeved outside the main shaft 7 and coaxially arranged with the main shaft 7. When in use, it is connected to the frame of the detection equipment to fix the entire mechanism; the lower thrust cover 3 is sleeved outside the main shaft 7 and forms an interference fit between the main shaft 7, which is used to support the entire rotary mechanism. The bottom surface of the upper thrust cover 1 and the top surface of the sleeve 9, and the top surface of the lower thrust cover 3 and the bottom surface of the sleeve 9 can rotate relative to each other; the nut 5 is connected to the bottom end of the main shaft 7, and is used to apply a preload to the upper thrust cover 1, the lower thrust cover 3 and the sleeve 9 in the axial direction, so that the rotating part of the rotary mechanism fits tightly, thereby ensuring the rotation accuracy.

[0043] When in use, the present invention is connected to the frame of the detection equipment through the shaft sleeve 9, and the main shaft 7 is connected to the drive motor through the pulley. The annular thin disk with a conical surface is fixed on the positioning platform 10 with the center hole as the reference through a clearance fit. The magnetic force of the strong magnetic column 11 is used to make the convex conical surface of the annular thin disk with a conical surface fit with the conical surface of the positioning platform 10 to complete the positioning of the annular thin disk with a conical surface; the motor is started to drive the main shaft 7 to rotate, driving the annular thin disk with a conical surface to rotate synchronously, and the sensor starts to collect points, and the measurement is completed after one rotation.

[0044] Example 3

[0045] A magnetic adsorption type positioning and rotating mechanism includes a positioning mechanism and a rotating mechanism. The positioning mechanism and the rotating mechanism are fixedly connected to form a whole that can rotate synchronously. The positioning mechanism rotates under the drive of a driving motor, thereby realizing the rotation detection of an annular thin disk with a tapered surface.

[0046] The positioning mechanism includes a positioning platform 10, which is vertically arranged and has a stepped shaft structure. From top to bottom, there are the first shaft segment 10-1, the second shaft segment 10-2, the third shaft segment 10-3 and the fourth shaft segment 10-4. The axial height of the first shaft segment 10-1 is 5 mm, and the shaft diameter is made according to the center hole of the annular thin disk with a tapered surface and the clearance between the two is matched, and the clearance is 0.01 mm; the shaft diameter of the second shaft segment 10-2 is larger than the shaft diameter of the first shaft segment 10-1, and its end face close to the first shaft segment 10-1 is a concave surface with a cone angle of 170°. The concave surface is provided with 4 holes near the outer edge that vertically penetrate the second shaft segment 10-2 and are evenly distributed in a circular array. A strong magnetic column guide hole 12 with a hole diameter of 6mm, a strong magnetic column 11 with a height of 5mm is arranged in the strong magnetic column guide hole 12, the strong magnetic column 11 and the strong magnetic column guide hole 12 have an interference fit, and the end face of the top is 1mm lower than the top of the strong magnetic column guide hole 12, which is used to adsorb the annular thin disk with a conical surface to achieve axial positioning, and the adsorption force of the strong magnetic column 11 on the annular thin disk with a conical surface is adjusted by changing the axial position of the strong magnetic column 11 in the strong magnetic column guide hole 12; the axial diameter of the third shaft segment 10-3 is smaller than the axial diameter of the second shaft segment 10-2 (based on not blocking the strong magnetic column guide hole 12); the fourth shaft segment 10-4 is provided with 4 axial through holes evenly distributed in a circular array near the outer edge for passing screws.

[0047] The present invention can realize the rapid installation and positioning of the annular thin disk with a conical surface. The axial positioning adopts the magnetic adsorption method. The adsorption force can be adjusted by changing the axial position of the strong magnetic column 11 in the strong magnetic column guide hole 12. The secondary deformation of the annular thin disk with a conical surface during the detection and positioning process can be avoided, and the accurate detection of the shape and position tolerance parameters of the annular thin disk with a conical surface can be guaranteed.

[0048] The rotary mechanism is a precision rotary shaft system with a rotation accuracy of up to 0.001 mm, comprising an upper thrust cover 1, a main shaft 7, a sleeve 9, a ball carrier 22, balls 8, a lower thrust cover 3, a disc spring 6, a washer 4 and a nut 5;

[0049] The upper thrust cover 1 is a rotating part that can realize the axial positioning of the entire shaft system. The upper thrust cover 1 is provided with axial through holes arranged in a circumferential array near the center for connecting with the main shaft 7. The upper thrust cover 1 is provided with axial threaded through holes arranged in a circumferential array near the edge for connecting with the positioning platform 10. The top end is connected to the positioning platform 10 of the positioning mechanism, and the bottom end is connected to the top end of the main shaft 7, serving as a connecting part connecting the positioning mechanism and the rotary mechanism.

[0050] The main shaft 7 is the main rotating part and serves as a transmission part. Its top end is provided with axial threaded holes arranged in a circular array for screwing in screws to achieve connection with the upper thrust cover 1. The bottom end is processed with external threads for screwing in the nut 5 to achieve the overall assembly of the rotating mechanism. When in use, the main shaft 7 is connected to the drive motor through a pulley to achieve rotation of the mechanism.

[0051] The shaft sleeve 9 is a stationary part, which is sleeved outside the main shaft 7 and coaxially arranged with the main shaft 7. The same annular convex edges are provided at both ends of the shaft sleeve 9. When in use, it is connected to the frame of the detection equipment to fix the entire mechanism.

[0052] The ball rack 22 is arranged between the main shaft 7 and the sleeve 9, and is a clamping and limiting mechanism for the ball 8. Its shape is the same as that of the sleeve 9. A through hole for placing the ball 8 is processed on the ball rack 22, and the ball 8 can roll freely in the through hole, ensuring that the ball 8 is arranged in a certain order and does not shift during the rotation process, thereby ensuring the rotation accuracy; the ball 8 is a standard zero-grade steel ball, which is coated with lubricating oil on the outer surface and placed in the corresponding through hole of the ball rack 22, and is evenly distributed between the upper thrust cover 1 and the sleeve 9, between the sleeve 9 and the lower thrust cover 3, and between the sleeve 9 and the main shaft 7. A dense ball shaft system is arranged in the axial and radial directions of the main shaft 7. The dense arrangement of the balls 8 helps The influence of various errors on the position of the rotation center is reduced, the effective contact surface is increased, and an averaging effect is played, which is beneficial to improving the rotation accuracy of the shaft system; the dense balls 8 are arranged in an approximately spiral arrangement, so that each ball 8 rolls on each other according to its own raceway without repetition during operation, reducing repeated wear and maintaining the rotation accuracy of the shaft system for a long time; the main shaft 7, sleeve 9 and ball 8 are assembled with interference fit, and this assembly method can make the main shaft 7, sleeve 9 and ball 8 produce elastic deformation, reducing the influence of dimensional errors and geometric shape errors of parts such as the main shaft 7, sleeve 9 and ball 8, which can not only improve the stability and rotation accuracy of the shaft system, but also increase the rigidity of the shaft system.

[0053] The lower thrust cover 3 is sleeved outside the main shaft 7 and forms an interference fit with the main shaft 7, which is used to support the entire rotary mechanism. The bottom surface of the upper thrust cover 1 and the top surface of the shaft sleeve 9, as well as the top surface of the lower thrust cover 3 and the bottom surface of the shaft sleeve 9 can rotate relative to each other.

[0054] A disc spring 6 is sleeved on the bottom of the main shaft 7 close to the bottom surface of the lower thrust cover 3. A depression matching the disc spring 6 is formed upward on the bottom surface of the lower thrust cover 3. The disc spring 6 is used to reduce the influence of the mutual position error between the main shaft 7, the sleeve 9, the upper thrust cover 1 and the lower thrust cover 3, thereby improving the axial rotation accuracy and axial rigidity of the shaft system.

[0055] A washer 4 is sleeved on the portion of the main shaft 7 between the nut 5 and the disc spring 6 , and the washer 4 is used to transmit a preload.

[0056] The nut 5 is connected to the bottom end of the main shaft 7 and is used to apply preload to the upper thrust cover 1, the lower thrust cover 3 and the sleeve 9 in the axial direction, so that the rotating part of the rotary mechanism fits tightly, thereby ensuring the rotation accuracy.

[0057] The rotation accuracy of the rotary mechanism reaches 0.003mm, and the accuracy error is within ±0.001mm at different speeds, minimizing the system error of the transmission system.

[0058] When in use, the present invention is connected to the frame of the detection equipment through the shaft sleeve 9, and the main shaft 7 is connected to the drive motor through the pulley. The annular thin disk with a conical surface is installed on the positioning platform 10 with a clearance fit based on the center hole. The magnetic force of the strong magnetic column 11 makes the convex conical surface of the annular thin disk with a conical surface fit with the conical surface of the positioning platform 10 to achieve line contact, thereby completing the positioning of the annular thin disk with a conical surface; starting the motor, driving the main shaft 7 to rotate, driving the annular thin disk with a conical surface to rotate synchronously, sampling points through the sensor, and completing the measurement after the annular thin disk with a conical surface rotates one circle.

[0059] Example 4

[0060] A detection device with a magnetic adsorption positioning and rotation mechanism, comprising a frame, a driving mechanism, a measuring mechanism, the magnetic adsorption positioning and rotation mechanism as described in Example 3, a control system, and a measuring and analysis system. The magnetic adsorption positioning and rotation mechanism is connected to the frame of the device through the shaft sleeve 9, and the driving mechanism is connected to the main shaft 7 through a pulley to drive the magnetic adsorption positioning and rotation mechanism to rotate. The measuring mechanism is provided with a sensor, which is used to collect data points at the measured position of the workpiece (a ring-shaped thin disk with a conical surface). More than 500 points can be collected during one rotation, thereby effectively reducing the standard deviation of the measurement result and improving the measurement accuracy. The sensor is designed with a matching The A / D conversion and amplification circuit can directly output digital signals. At the same time, the circuit has a gain adjustment function, which is convenient for adjusting the linearity of the sensor. The control system is used to control various electrical components (solenoid valves, relays, motors, etc.), and then control the mechanical movements of the magnetic adsorption positioning and rotation mechanism, the driving mechanism and the measuring mechanism to complete the rotation measurement; the measurement and analysis system is used to realize the measurement function of the device, human-computer interaction, data display, storage and analysis. Its unique sensor signal conditioning function and measurement result compensation function meet the accuracy optimization requirements under the relative measurement method; it also has the sampling point control setting function and the rotation circle number adjustment function for rotation measurement, which effectively improves the measurement accuracy.

[0061] The present invention provides a detection device with a magnetic adsorption positioning and rotation mechanism with a measurement process as follows: starting a control system and a measurement system, placing a standard part used for zero position adjustment and value traceability of a sensor on the magnetic adsorption positioning and rotation mechanism, removing the standard part after setting the zero position of the sensor, placing a workpiece (an annular thin disk with a conical surface), starting a measurement and analysis system, rotating the workpiece, and collecting signals from the sensor. The program automatically stops after the rotation time set by the program is reached, and the measurement and analysis system calculates and displays the measurement results based on the signals collected by the sensor and performs data statistical analysis.

[0062] The standard part adopts a local profiling structure design, which not only meets the calibration function but also improves the rigidity of the standard part, making it less prone to deformation and ensuring the stability of the measured value. The present invention realizes the integrated design of the rotary shaft system and the workpiece positioning platform 10, avoiding the occurrence of matching errors between the transmission mechanism and the positioning mechanism. It also has significant advantages such as low friction torque, high load, and high reliability. It can effectively avoid the occurrence of system errors caused by the low rotation accuracy of the rotary shaft system and can meet the sampling needs of rapid detection of annular thin disks with tapered surfaces.

[0063] For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" are used in the embodiments to describe the relationship of one element or feature relative to another element or feature shown in the figures. It should be understood that, in addition to the orientation shown in the figures, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, an element described as being "below" another element or feature will be positioned "above" the other element or feature. Therefore, the exemplary term "below" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here should be interpreted accordingly.

[0064] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0065] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A magnetic adsorption positioning and rotation mechanism, characterized in that: It includes a positioning mechanism and a rotating mechanism that are fixedly connected and form a synchronous rotating whole; The positioning mechanism includes a positioning platform, and a strong magnetic column for adsorbing the annular thin disk with a conical surface is provided on the top of the positioning platform; The rotary mechanism includes a main shaft fixedly connected to the bottom end of the positioning platform and capable of rotating in the axial direction, and a sleeve sleeved outside the main shaft, wherein the sleeve is coaxially arranged with the main shaft and forms relative rotation with the main shaft; The rotary mechanism further includes an upper thrust cover, a lower thrust cover and a nut. The upper thrust cover is fixedly connected to the top end of the main shaft, and the bottom surface of the upper thrust cover and the top surface of the shaft sleeve can rotate relative to each other. The lower thrust cover is sleeved outside the main shaft and the top surface of the lower thrust cover and the bottom surface of the shaft sleeve can rotate relative to each other. The nut is connected to the bottom end of the main shaft by a threaded connection. The positioning platform is vertically arranged and has a stepped shaft structure, which comprises a first shaft section, a second shaft section, a third shaft section and a fourth shaft section from top to bottom. The shaft diameter of the first shaft section is made according to the center hole of the annular thin disk with a tapered surface and the two are clearance-matched. The axial height of the first shaft section is 0.3mm-1mm; the shaft diameter of the second shaft section is larger than the shaft diameter of the first shaft section, and its end face close to the first shaft section is a concave surface with a cone angle of 0°-180°. The concave surface is provided with 3-6 strong magnetic column guide holes vertically passing through the second shaft section and uniformly distributed in a circular array near the outer edge. The strong magnetic column is arranged in the strong magnetic column guide hole and its end face is lower than the top of the strong magnetic column guide hole; the shaft diameter of the third shaft section is smaller than the shaft diameter of the second shaft section; the fourth shaft section is provided with 3-6 axial through holes uniformly distributed in a circular array near the outer edge; The top end surface of the main shaft is provided with axial threaded holes arranged in a circumferential array for screwing in screws to achieve connection with the upper thrust cover; The upper thrust cover is provided with axial through holes arranged in a circumferential array near the center for connecting with the main shaft, and the upper thrust cover is provided with axial threaded through holes arranged in a circumferential array near the edge for connecting with the positioning platform.

2. The magnetic adsorption positioning and rotation mechanism according to claim 1, characterized in that: The upper thrust cover is integrally formed with the positioning platform or fixedly connected with the positioning platform by screws.

3. The magnetic adsorption positioning and rotation mechanism according to claim 1, characterized in that: Both ends of the sleeve are provided with the same annular ridges, and a ball rack is provided between the main shaft and the sleeve. The ball rack has the same shape as the sleeve, and balls that can roll freely in the ball rack are embedded in the ball rack. The balls are distributed between the upper thrust cover and the sleeve, between the sleeve and the lower thrust cover, and between the sleeve and the main shaft to realize the shaft system rotation of the main shaft.

4. The magnetic adsorption positioning and rotation mechanism according to claim 3, characterized in that: The balls located between the shaft sleeve and the main shaft are arranged in a spiral shape.

5. The magnetic adsorption positioning and rotation mechanism according to claim 1, characterized in that: The strong magnetic column and the strong magnetic column guide hole are interference fit.

6. The magnetic adsorption positioning and rotation mechanism according to claim 1, characterized in that: A disc spring is sleeved on the bottom of the main shaft close to the bottom surface of the lower thrust cover, and a recess matching the disc spring is formed upward on the bottom surface of the lower thrust cover.

7. The magnetic adsorption positioning and rotation mechanism according to claim 6, characterized in that: A washer is sleeved on the portion of the main shaft located between the nut and the disc spring.

8. The method for using the magnetic adsorption positioning and rotating mechanism according to any one of claims 1 to 7, wherein: The mechanism is connected to the frame of the detection equipment through the shaft sleeve, and the main shaft is connected to the driving motor through a pulley to realize the rotation of the mechanism; the specific use process is: the annular thin disk with a conical surface is installed on the positioning platform with a center hole as a reference through a clearance fit, and the magnetic force of the strong magnetic column makes the convex conical surface of the annular thin disk with a conical surface fit with the conical surface of the positioning platform to achieve line contact, thereby completing the positioning of the annular thin disk with a conical surface; starting the motor, driving the main shaft to rotate, driving the annular thin disk with a conical surface to rotate synchronously, sampling points through the sensor, and completing the measurement after the annular thin disk with a conical surface rotates one circle.

9. A detection device with a magnetic adsorption positioning and rotation mechanism, characterized in that: It includes a frame, a driving mechanism, a measuring mechanism, a magnetic adsorption positioning and rotation mechanism as described in any one of claims 1 to 7, a control system, and a measuring and analysis system. The magnetic adsorption positioning and rotation mechanism is fixed on the frame, the driving mechanism drives the magnetic adsorption positioning and rotation mechanism to rotate, the measuring mechanism is used to collect coordinate signals at different positions on the annular thin disk with a conical surface, and the measuring and analysis system calculates and displays the measurement results and performs data statistical analysis based on the signals collected by the measuring mechanism.

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